Dictionary definition · roof
noun
- a protective covering that covers or forms the top of a building
- protective covering on top of a motor vehicle
- the inner top surface of a covered area or hollow space"the roof of the cave was very high"
- an upper limit on what is allowed"he put a ceiling on the number of women who worked for him"
verb
- provide a building with a roof; cover a building with a roof
Source: Open English WordNet (CC BY 4.0).